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The Proton Improvement Plan, Stage Two (PIP-II) is a program of upgradesproposed for the Fermilab injection complex, which central part is an 800 MeV,2 mA CW SRF linac. A prototype of the PIP-II linac front end called PIP-IIInjector Test (PIP2IT) is being built at Fermilab. As of now, a 15 mA DC,30-keV H- ion source, a 2 m-long Low Energy Beam Transport (LEBT), a 2.1 MeV CWRFQ, followed by a 10 m Medium Energy Beam Transport (MEBT) have been assembledand commissioned. The MEBT bunch-by-bunch chopping system and the requirementof a low uncontrolled beam loss put stringent limitations on the beam envelopeand its variation. Measurements of transverse and longitudinal beam dynamics inthe MEBT were performed in the range of 1-10 mA of the RFQ beam current. Almostall measurements are made with 10 {\mu}s beam pulses in order to avoid damageto the beam line. This report presents measurements of the transverse opticswith differential trajectories, reconstruction of the beam envelope withscrapers and an Allison emittance scanner, as well as bunch length measurementswith a Fast Faraday Cup.

Experimental Study of Beam Dynamics In The PIP-II MEBT Prototype